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Madbox

Senior Back End Developer

Madbox

Senior Back End Developer at Madbox developing scalable public-facing APIs and optimizing backend performance. Join a fast-paced mobile gaming company to enhance game functionalities.

Posted 5/22/2026full-timeParis • 🇫🇷 FranceSeniorWebsite

Tech Stack

Tools & technologies
AWSCloudGoGoogle Cloud PlatformJavaScriptJenkinsMicroservicesMongoDBNode.jsReactTerraformTypeScript

About the role

Key responsibilities & impact
  • Design, build, and scale public-facing APIs in Go, hosted on GCP, serving millions of users with high availability and low latency.
  • Ensure backend reliability through comprehensive testing strategies and safe, rollout processes for API releases.
  • Monitor, troubleshoot, and optimize backend systems using Datadog, ensuring proactive reliability for player-facing services.
  • Collaborate with game teams, data engineers, and product managers to align technical solutions with business goals.
  • Contribute to and improve CI/CD pipelines — including GitHub Actions workflows with Terraform, and supporting Jenkins-based game pipelines alongside the dedicated owner.
  • Support the development and maintenance of internal tools and services in TypeScript/Node.js, hosted on AWS.

Requirements

What you’ll need
  • 5+ years of professional experience in backend development, with strong proficiency in Go and solid knowledge of TypeScript/Node.js, and familiarity with React for contributing to internal tool frontends.
  • Strong experience with MongoDB as a primary database.
  • Proven experience designing and operating scalable microservices and RESTful APIs, with a strong focus on performance and reliability.
  • Hands-on experience operating cloud infrastructure at scale, including managed services and networking.
  • GCP experience is preferred; AWS experience is also valuable.
  • Familiarity with CI/CD practices — Terraform and (GitHub Actions or Jenkins).
  • Comfortable working with observability tools, particularly Datadog.
  • Excellent communication skills; able to work in English in a cross-functional, international team.

Benefits

Comp & perks
  • Flexible work arrangements
  • Professional development opportunities

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools
GoTypeScriptNode.jsReactMongoDBmicroservicesRESTful APIsCI/CDTerraformGitHub Actions
Soft Skills
communicationcollaboration